2015 KTM 250 SX

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Weighting only 95.9 kg and powered by a 249 cc engine the KTM 250 SX offers the best power to weight ratio in its class. Its compact chassis, sleek body and superior ergonomics help it deliver impressive off road performances.

In terms of power, the KTM 250 SX is propelled by a 249 cc, 1 - cylinder, 2 - stroke, water - cooled engine with reed intake and exhaust control. The 2 stroke unit is brought to life by a kickstarter and is mated on a 5 speed, claw shifted transmission with wet multi-disc clutch (DDS).

The KTM 250 SX‘s engine is mounted on a central tube frame made of chrome molybdenum steel tubing.

You also get front and rear WP suspensions, all-around disc brakes and a 7.5 litre, lightweight polyethylene fuel tank.

Hit the jump for more information on the KTM 250 SX.

Overview

KTM 250 SX

KTM 250 SX 2015: Power Up

The 250 SX is regarded as the motocross motorcycle with the best power-to-weight ratio. The lightweight 2-stroke engine scores highly with unrivalled performance packed in an extremely light chassis – a formidable rival for the costlier 4-stroke competitors.

2015 KTM 250 SX Key Features:

KTM 250 SX

Unrivalled Handling:

Wheels
The wheels fitted for MY 2015 feature black coated, high-end Excel rims with lightweight, CNC-machined hubs and spokes with lightweight aluminium nipples, allowing highest levels of stability to be achieved, while keeping weight to a minimum. New Dunlop Geomax MX 52 tyres were developed in collaboration with the KTM USA factory team and offer perfect traction with top performance. The new rear sprockets save 50 grams in unsprung mass.

Brakes
High-tech brakes from Brembo have always been standard equipment on KTM offroad bikes and, together with the lightweight wave brake discs, they are the measure of all things in terms of brake technology. As the best brakes in the motocross class, they remain unchanged for MY 2015.

Top Ergonomics:

KTM 250 SX

Graphics
A new, refined graphic design with clear lines underlines the high demands made of a modern, state-of-the-art offroad motorcycle.

Bodywork
KTM engineers have focussed on designing the bodywork ergonomically and functionally in such a way that the whole motorcycle is in perfect harmony with the rider down to the very last detail. The front fender is a perfect example of how moulded plastic components can gain maximum stability with a well thought out structure and well-conceived attachment.

Seat
The ergonomically perfectly designed seat is equipped with a durable foam core, ensuring both greater comfort and higher stability.

Airbox
At the same time, the design of the airbox guarantees optimum protection of the air filter from dirt plus maximum air throughput for the highest performance. Quick replacement of the twin-air filter - without tools and in a matter of seconds - has long since been an unrivalled KTM standard.

Fuel Tank
All models in the SX range are equipped with a 7.5 litre, lightweight polyethylene fuel tank. The fuel pump system used on the 4-stroke motocross models is the same as that used on the 4-stroke enduro models, thereby allowing optional fitting of larger tanks from the PowerParts range or from the enduro models.

Handlebar
All SX models are equipped with the extremely sturdy, tapered Renthal Fatbar 827 handlebar that features an offset specially designed to meet the demands of motocross. In accordance with the proven KTM standard, the handlebar can be fixed in a choice of four positions. For MY 2015, it is equipped with softer two-component grips to spare the rider’s hands.

Top Performance:

KTM 250 SX

Engine
The powerful KTM 250 SX engine unites an unbeatable power-to-weight ratio with outstanding performance and extremely easy handling.

Clutch
A new DDS clutch (Damped Diaphragm Steel) with diaphragm spring and wear-free steel cage is fitted to the KTM 250 SX engine. The diaphragm spring, which preloads the package, not only reduces the operating force required to pull the clutch, but also provides space for integrated hub damping. The result: more traction and protection for the transmission. And with updated hydraulic clutch actuation from Brembo, the rider has everything under control right from the start.

Superior Chassis:

KTM 250 SX

Frame
The modern frame design of the SX models, comprising lightweight, high strength, chrome-molybdenum steel section tubes, combines maximum longitudinal stiffness with optimum torsional stiffness. A forged and milled cross-tube connects the two frame halves with the connecting rod of the linkage on the new SX frame for 2015. Omission of the weld seams leads to very precise manufacturing tolerances and greater safety - moreover, it saves another 60 grams of weight.

Linkage / Shock Absorber
The revamped damping system for MY 2015 features a new linkage with optimised geometry. The flatter progression with a higher initial rate ensures greater stability and lowers the rear end. In addition, the new design saves another 40 grams of weight. The fully adjustable WP 5018 shock absorber has been completely retuned to suit the new linkage.

Fork
The fully adjustable upside-down fork from WP Suspension has been perfectly tuned to the new rear wheel damping system and the new 22 mm front axle (formerly 26 mm) for MY 2015. The new axle provides a better feel for the front wheel and also saves a further 40 grams. The new fork stubs now feature an offset of 33 mm instead of 35 mm, which together with increased trail deliver greater ride stability. Furthermore, they accommodate newly developed, 50 gram lighter fork protectors.

Triple Clamps
High quality, CNC-machined triple clamps have long since been standard equipment at KTM. They ensure precise handling and provide a perceptible boost to the flexing characteristics and hence the responsiveness of the telescopic fork. The new O-ring carrier for the lower steering head bearing, a revised shaft tube and the new steering head bolt save another 40 grams.

Specifications

Engine1-cylinder 2-stroke engine, water-cooled, with reed intake and exhaust control
Displacement249 cm³
Bore66.4 mm
Stroke72 mm
Starting aidKickstarter
Transmission5 gear, claw shifted
Primary ratio26:72
Final drive13:48
ClutchWet multi-disc clutch DDS / Brembo hydraulics
Ignition systemContactless, controlled, fully electronic ignition system with digital ignition timing adjustment, type Kokusan
FrameCentral tube frame made of chrome molybdenum steel tubing
ForksWP Suspension Up Side Down 4860 MXMA CC
Shock absorberWP Suspension 5018 BAVP DCC
Suspension travel Front300 mm
Suspension travel Rear317 mm
Brake systemDisc brakes, brake calipers on floating bearings
Brake discs - diameter Front260 mm
Brake discs - diameter Rear220 mm
Chain520 X-ring
Steering head angle63.5°
Wheel base1,495±10 mm
Ground clearance (unloaded)385 mm
Seat height (unloaded)992 mm
Total fuel tank capacity approx.7.5 l Unleaded premium fuel (95 octane), mixed with 2-stroke engine oil (1:60)
Weight without fuel approx.95.9 kg

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